Steve '05 Allroad

I'm looking at tires and am curious if anyone has tried 235-55-17's??? I know they are wider, but they measure about 1/4" taller as well. Any possible issues? Speedometer might be off, I suppose.

Suggestions or thoughts?

PaperToast

those would be fine

im running 225/60's now with no problems, and will go with a 235/50 next i think

funny thing with the 60's is that the speedomter is exactly right

all(over)road

A 50 series would be a better fit with a 235mm... some allroaders do a 245/50/17....a good deal more money too for the wider sizes.

I run a 255 on the RS6 18" rims sometimes. I think the 2004 owners manual has a pix of an allroad with the C5 RS6 rims on it.

There's several good tire size calculators on the web...though I don't have one in front of me to link to....google it.

Romario

You can open Elsa Win and try to find chapter of adaptation of electronic components. It's contain info about all possible tire's sizes and coding information for ABS system which measure and calculate speed of car by the signals from front and rear ABS-sensors.
Tire size more esthetic or visual effectiveness and doesn't matter what would install but you must remember about correct coding of your new tire’s size.

allroad55

Write down diameter of each size under 18inch for reference.

225/45R18 = 659.7mm(18mm lower than rear)
245/45R18 = 677.7mm

225/50R18 = 682.2mm
235/50R18 = 692.2mm
235/45R18 = 668.7mm

SO that 225/50R18 and 235/45R18 is better to fit than 225/45R18
for front of our allroad.
245/45R18 is best matching for rear.
However I changed my allroad front air springs height around
15mm lower than rear by VAG-COM purposely to get more stable handling, so...
I think you can try to wear 225/45R18, and after that you can get more stable driving incidentally.
Please post this result.

ricam78

Here is a calc I have always used.
http://www.miata.net/garage/tirecalc.html

allroad55

E.G. 245/45R18
245=width(mm)
45=thickness ratio(%)
18=rim diameter(inch)
1inch = 25.4mm
Tire diameter = Thickness*2 + Rim Diameter
Thickness = 245*0.45 = 110.25mm
Rim Diameter = 18*25.4 = 457.2mm
Therefore
Tire diameter = 110.25*2 + 457.2 = 677.7mm
Thanks.

Concentric190

I run 235/55/17 wintersports on the stock double spokes and am real happy with the fittament.

in the summer I have 255/40/19 on RS6 wheels.

IndieRockSteve

what's the bolt pattern for the Allroad? I have my 18's from my 2000 A4 Avant, I was thinking using them as summer wheels and the stock for my snow tires.

ricam78

5x112 57.1 bore 25 offset for stock allroad rims